Fix Ekho Spanish version on Windows 10.

[hgneng]

ekho-spanish-4.9.3.exe works on Windows 7 but not Windows 10. Need to be fixed.

Ekho 6.5 with NVDA is crashing always.

(reported by Yerko Alfaro)

[hgneng]

Ekho 4.9.3 crashes at the very beginning when selecting it as NVDA voice.

[hgneng]

Test result: Ekho 4.9.3 works fine with Balabolka. (on Windows 10)

[hgneng]

After upgrade Ekho to 6.5, NVDA no longer show that Assertion window but hangs.

I am going to port latest Ekho version to Windows on Visual Studio 2019 and check whether crash issue still exists.

[hgneng]

The latest version of eSpeak runs fine with NVDA. It shows that SAPI5 still works fine on Windows 10.

eSpeak-NG has not implemented SAPI5 yet.

[hgneng]

update progress: I have fixed TTSApp, MkVoice, TestSapi5 building issue. Main project TTSEng is on going, but is should a lot harder to fix. The old project file is based on Visual Studio 2005. Environment has changed a lot in 2019.

[hgneng]

TTSEng relied on Festival library and it needs Festival library build with VS2019. However, Festival's makefile is not supported building on Windows 10 and VS2019. This is a difficult issue.

Reference: https://social.msdn.microsoft.com/Forums/en-US/3c5b19cb-dcdd-49d7-a1b4-c526d2127a57/error-lnk2019-unresolved-external-symbol-impiobfunc-referenced-with-vs-2015

[hgneng]

update progress:

I switch dev environment to my old XP laptop with VS2005. Latest code has been merged and fix building issues.

Audio file size is abnormally smaller than I expect. This should be an issue.

My laptop's audio IO seems doesn't work any more. I am trying to find a USB sound card to do testing.

[hgneng]

The audio IO issue has gone. It seems that it's accidentally mute.

Audio file size has been fixed.

Base tests on Windows XP has passed (without Festival module).

I am going to make a package and test it on Windows 10 to make sure it doesn't crash (without Festival). If it works, I will try to enable Festival and test again.

[hgneng]

new package (without Festival) assertion fail at file list line 309.

[hgneng]

assertion fail at line 309 is reproduced in Windows XP with NVDA 20161.

The error message is "Expression: list iterators incompatible".

[hgneng]

I get "Debug Assertion Failed dbgdel.cpp Line: 52 _BLOCK_TYPE_IS_VALID(pHead->nBlockUse)" in Windows XP with NVDA20161 and Ekho.

[hgneng]

Crash issues has been fixed: https://eguidedog.net/files/ekho-mandarin-spanish-8.6.exe

[hgneng]

Some feedback from Yerko:

1. Is it possible put the male voice of festival in spanish? it has a better pronunciation than the female.
2. It owould be better increase a bit of volume of Festival voice too.
3. festival is not verbalizing correctly the speacial characters of spanish. Like our letters "ñ", "á", "é", "í", "ó", "ú" and "ü".
4. the synth Sappi 5 with festival is crashing.

[hgneng]

A sample word that cannot read correctly: el soñador

[hgneng]

switched to spanish male voice. This voice volume should be loud enough. Special character and crashing issue is still investigating.
https://eguidedog.net/tmp/ekho-mandarin-spanish-8.6.1.exe